can't 和 mustn't.

Question

1、-The sports shoes must be Linda's.-No, they ______ be .They're too small for her.2、-Who's the man over there? Is it Mr.Black?-It ____ be him . He's much taller.3、-Listen! Helen is singing in the next room.-It _____ be Helen. She has gone to Bejing.

Answer 1

3个都是can't.表示"不能"意义的can't与mustn't的区别。如： can't表示"不能",意指没有能力;mustn't表示不能，意指"禁止；不允许 The baby is asleep. You mustn't make any noise. The boy is so tired that he can't go any further. 从意思上记就可以啦，这两个很容易区分的 can't是说不能，不可以 mustn't是绝对不行，完全不允许的意思。 mustn't程度很强 用MUSTN'T的时候，是表示已经肯定了某事。must be表示肯定猜测 can't be表示否定猜测 没有mustn't be这个用法 must作为情态动词，否定式是cannot而不是mustn't can't be 是用于否定句中的推测译为“不可能是” musn't be 是“肯定不是” 两个语气不同 can't be 是“不可能是” musn't be 是“肯定不是” must是更肯定的？

Answer 2

1.can't2.can't3.can'tmust是肯定推测，其否定形式是can't，而不是mustn't，mustn't表示严禁做某事，还有不懂的，欢迎追问！

Answer 3

1、-The sports shoes must be Linda's.-No, they can't be .They're too small for her.2、-Who's the man over there? Is it Mr.Black?-It can't be him . He's much taller.3、-Listen! Helen is singing in the next room.-It mustn't be Helen. She has gone to Bejing.

Answer 4

1，can not 猜测的语气2, must not 肯定的语气3, must not

Answer 5

mustn'tmustn'tmustn't